Pipe joint



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' March 5,1929. n JHNSQ'N IPE JOINT 'Filed Aug. 19, 1925 WITNESSES .-20not "Patented 5,1929. j

' UNITED s'la'lfssV 1,704,003 PATENT olv-"Fics1 A PERCY 'GRAHAM JOHNSON,or LONDON, ENGLAND, .assIGfNoNl To vIcTAULIc COMPANY LIMITED, oF LONDON,ENGLAND.

rIIE JoINT.

Appliization led August 19, 1925., Serial No.

4 The invention relates'to pipe joints of thel kind wherein a sealingring ofexible material extends across and seals the gap between theadjacent ends of pipes to be 5 joined. 'While 'the invention isv-applicable topipe joints having various types of sealling- 'iifngs forspanning the gaps between the endsof pipes, it is particularlyapplicable to pipe joints in which the sealing rings have annularchambers .for receiving iuid from the pipes, andwhich have flangesadapted to bear upon the exterior surfaces of .the-pipes and adapted tobe pressed into sealing engagement wi 'h them by the pressure of theHuid-carried by thepipes. The object 1s to provide means for preventingundue movements of the members of ther joint along the pipes,particularly when the ipes `and members of the joint are rovied withinter-engaging parts such vas anges, grooves,and the; like forpreventing suchv movements.

' -Two embodiments of the invention are i1- lustrated in theaccompanying drawings, of

which Figs. 1 and 2 are longitudinal central sectional views through theadjacent ends of\pipes and joints connecting them. In the practice ofthe invention a gap between. the adjacent ends of two pipes is .spannedby a .flexible sealing ring which bears upon the outer, surfaces of thepipes, and a positioning ring'engages the sealing ring and extends intothev gap' between the ends lof thepipes, so that if 4thesealing ring ,35moves. upon the pipes its movement -will-be limited by the engagement ofthe inwardly extending portion ofthe positioning ring with Vthe end ofonev or the other of the pipes. 14 Having' reference tothe embodiment of49 the inventionillustrated in Fig. 1, the gap between the. adjacentends of two pipes 2 and 3 is spanned by a flexiblesealing ringl 4 havingan annularluid-reeeiving chamber 15 and provided lwith' ianges or4 llps7 and 8 which -bear uponthe outer surfaces of the pipes. The sealingring here shown is the 'sanieasfthat disclosed in Patent. No. .1,541 601to Tribe granted `June 9, 1925, and such rin-g is' usedv 1n lpreferenceto others which v 5 lspan the gaps between pipes.v The positioning ringmthis case is a :flat metal ring 5 of uniform section, the outerperiphery of A 4which extends intova -groove 9rin the body .at the sidesoffgi'oove 9 isp'rovid with or back of sealing ring 4.' The sealiengring eiectively engages said ring. In this em- 51,129, and in creatBritain' August 2s, 1924.

stiili'ening ribs 12 and 13 to .firmly engage positioning ringl 5,which, as shown, extends inwardly and lies in the gap between the endsof thepipes. Sealing ring 4' is preferably surrounded by and held in anannular channel-shaped metal housing 6.

In the embodiment` 'Ofthe invention illustrated in Fig. '2, the sealingring 4a is the same as ring i in \Fig. 1, except that ring` 4a 1s notprovided with a special groove for .65 receivlng the positioning ring.In this'case v a. positioning ringpa of T-shaped cross sectlonlias itshead 10 arran ed in the pressurerecelving chamber 15a o the sealingring, andhas its web member -or center flange 11 lying 1n the gapbetween the pipes. The

` head l0 of positioning member 5 is of substantially lthe same .widthas the annular chamber ofthe sealing ring, and therefore bo'diment ofthe invention the sealing ring is illustrated as being held in anannular metalhousing 6n formed of two parts meeting in a planetransversely of the axis ofthe pipes and :connected to eachother bybolts 12.v

In both embodiments ofthe invention, the 'pipes 2 and 3 are not providedexternally -with, flanges, grooves or equivalent'configurations forengagement .by the members of the pipe joints to prevent movements ofthe joints uponthe pipes. Such movements are prevented by the inwardlyextending por- "tions of the positioning rings, which, however,`preferably do not extend inwardly beyondthe interior walls of thepipes, and therefore do not diminish their eltective diameters. Theadvantage of using plain-end pipes'resdes first in their cheapness, andsecondly in the ease of 4making joints between them and of taking outand replacing 95. a section of pipe in a line, as will be understoodwhen it is observed that a plain-end pipe may be slipped 'into anassembled pipe joint of thecharacter shown herein.

` According to the provisions of the patent statutes I have explainedthe principle and operation of my invention, and have illustrated what Inow consider to represent its best embodiments. However, I desire tohave it 'understood that, within the scope of 105 the appended claims,the invention may be practiced by other forms of construction than thosespecifically shown and described.

I claim as my invention:

'1. The combination of two pipes having 110 l their ends adjacent toeach other with a gap between them, of a unitary exible sealing ringspanning the gap between said plpes and having an annular pressurechamber and provided with flanges slidably bearing upon the outersurface of the pipe ends, a metal housing enclosing said sealing ring,and a positioning ring extending into said chain! ber of the sealingring and unconnectedV to said housing, a portion of said positioningring lying in thegapbetween the ends of said pipes.

, l 2. rThe combination of two pipes having their ends-adjacent to eachother with a gap between them, of a unitary flexible sealing ringspanning the gap between said pipes and having an' annular pressurechamber and provided with flanges slidably bearing upon the outersurface of the pipe ends, and a positioning-ring T-shaped in crosssect-ion having its head lying in said chamber of the sealing ring andits center flange lying in the gap between the ends of said pipes.y

lntes'tmony whereof, I sign-my name.

Planer GRAHAM JOHNSON,

